Portable key-seat cutter



(No Model.) 2 sheets -she'et 1.,

M. MORTON.

PQRTABLE KEY SEAT CUTTER. No. 390,306. Patented 001;."2, 1888.

Mummy V P? IJVEJVTOR (No Model.) z'sneets-sheen 2. M. MORTON.

.PORTABLE KEY SEAT CUTTER.

No. 390,306. Patented 001;. 2,1888.

IIIIIII a 1111 m 'm' ml @1 1 UNiTEn STATES PATENT Orrica.

IIIATTHEW' MORTON, OF DETROIT, MICHIGAN.

PORTABLE KEY-SEAT CUTTER.

SPECIFICATION forming part of Letters Patent No. 390,306, dated October2,1888.

Application filed November 4,1887. Serial No. 254,302. (No model.)

To all whom it may concern:

Be it known that I, MATTHEW MORTON, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Portable Key-Seat Gutters; andIdeclare the following to be a full, clear,and we act description of thesame, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

My invention consists of the combinations of devices and applianceshereinafter specified, and more particularly pointed out in the claims.

In the drawings, Figure 1 is a view in side elevation of a machineembodying my invention in use cutting a key-seat in the hub ofa wheel.Fig. 2 is a rear elevation of the said machine with the rack-barremoved. Fig. 3 is a plan view of the machine. Fig. 4 is a view of avariation. Fig. 5 is a cross-section on the line a w of Fig. 1. Fig.6 isaseparate view of that portion which bears the rack-bar and cutter. Fig.7 represents a detachable clutch for engaging or disengaging thedrivewheel and its shaft.

Heretofore in machinery for making keyscats the machinery itself hasbeen of a permanent and cumbersome character, and it has been necessaryto move the pulley-wheel or other object to be cut and place it upon thebed of the machine, thus requiring a vast amount of heavy handling andthe consumption of valuable time. This has been especially true in thecase of large pulley-wheels, such as are employed upon stationaryengines, drive-shafts, 85c.

It is the object of my invention to provide a key-seatcutting machineportable in its character and adapted to be moved to any point where itis desired to form a key-seat in a pulley or to do similar cutting, thesaid machine being provided with means for ready adjustment upon thearticle to be thus out.

To this end A may represent the hub of a pulley-wheel in which it isdesired to out a key-seat.

B represents the supporting-frame of my improved machine, one portion ofwhich is adapted to project down into the hub to be cut, and anotherportion projects out horizontally and is provided at its end with across head, B.

G is a traveling frame which carries the rack-bar D, to which the cutterDis attached, and an upright portion of this frame 0 also forms thesupports or bearings for the neces sary drive-shaft E and gear-wheels EE E. The horizontal portion of the frame 0 is dovetailed or otherwiseengaged upon the horizon tal arm of the frame B, so as to slide freelythereon.

F is a feedscrew threaded through thehead B and impinging against theframe 0 for feeding the frame forward and the cutter to its work.

G represents a rod or bar passing the head B, and provided at its innerend with a shoulder, G, adapted to engage within the hub. A nut, G isprovided for exerting the tension on the rod, and thus to crowd thevertical portion of the frame B firmly against the interior of the hub.

O is an arm or backing attached to the frame 0 by a bolt or bolts 0.This arm 0 projects downward and forms a backing or resistance for thelower portion of the rack-bar, which bears the cutter D.

H is a wedge, adapted by means of the rod and nut' H, or otherconvenient means, to be adjusted downward, and so wedge the lower partof the frame B firmly against the interior face of the hub.

The edge I) of the frame B may be slightly inclined from top to bottom,corresponding with the usual incline of the bottom of a keyseat.

The operation of the machine will now be understood. If a key-seat is tobe cut in a pulley, A, the machine is taken to the locality of thepulley, and the vertical portion of the frame B is introduced into thehub. The shoulder G of the rod G- is also engaged within the hub. Thenut G is then run down until the rod G has forced the frame B firmlyagainst the interior face of the hub. The wedge H is also brought down,so as to assist in forcing the frame B to a firm bearing. The inclinedface I) will then rest against the inner surface of the hub adjacent tothe portion where the key-seat is to be cut. The rack-bar being at itslowest point, its carrying-frame O is forced forward by the feed-screw Fsufficiently to give to the cutter its proper bite. Power is thenapplied to the pulley e, which, communicated through the drive shaft Eand the gearwheels E E E causes the rack-bar D and cutter to travelupward. As before explained, the face b is inclined toward this travelof the cutter just enough to cause the cutter to cut a little deeper atone end of the hub than at the other, corresponding with the usualincline for such a key-seat. After the cutter has com pleted itsupstroke the set-screw is reversed slightly to permit the cutter todescend freely. It is then set forward, so as to give the cutter anotherbite, and the operation is repeated until a proper depth of out has beenobtained.

A scale, I, and an index-finger, 1, may be provided for indicating tothe workman just the depth of cut he may desire to give to the cutter.

In Fig. 3 there is shown projecting from the frame G, through the headB, rods J and K. The rod J is threaded at its outer end and providedwith a hand-nut, J,while the rod K is provided with a spring, K. Thepurpose of this construction is as follows: WVheu it is desired to feedthe frame 0 forward, the nut J is loosened a distance corresponding tothe distance of the desired feed. The feed'serew F is then run forwarduntil it is stopped by the nut J impinging against the head B. Now, inorder to permit the cutter to drop freely, the feed screw F is run back,and the spring K serves to cause the frame B to follow the screw back.The nut J may be then turned back to correspond with the new bite of thecutter and the operation be repeated.

Now, referring to Fig. 2, the drive-pulley e may be engaged with itsshaft E by a clutch, which can be readily thrown in or out of gear.NVhen the clutch is in gear, the shaft will turn with the wheel. When itis thrown out of gear, the wheel will turn freely, and the shaft is freeto reverse and turn in the opposite direction, as it would at once do bythe weight of the rack-bar D. t-er has reached the upper end of itsstroke the said clutch may be disengaged. The weight of the rack-bar D.would cause it to drop quickly to the bottom of its stroke and bring thecutter into position for a new bite. Such a clutch mechanism is shown indetail in Fig. 7, in which L represents a clutch engaged with the shaft,so as to slide thereon by a spline-andgrooved connection, in the usualway, and L is a lever for throwing it into or out of engagement with thedrive-pulley.

I do not of course limit myself to any particular form ofclutchmechanism, for a friction-clutch might be employed, or any one of avariety of well-known appliances might be used for this purpose withoutdeparting from my invention.

Power may be applied to this device by means of a cable or belt in theusual manner In this way when the cut-.

with tools of this character, there being the ordinary appliances forlengthening or shortening the belt, according as the tool may be desiredfor use at a point nearer to or farther from the shaft by which themachine is driven.

A tool of this description, being thoroughly portable, may be carried toany point desired, where the work is lying ready to be provided with itskey-seat, and it is immaterial whether the pulley or other device belying in a perfectly horizontal position or not, since the tool willunder any circumstances adjust itself perfectly to perform its work, andwill perform it just as readily in one position as in another, it beingpreferable, ofcourse, that it should stand sufficiently erect to permitthe rack-bar D to drop by gravity, for otherwise it would be necessaryto return it by hand or to reverse the motion of the drive-pulley forthat purpose.

In Fig. 4 is shown a modification of the invention, in which the uprightarm of the frame 0 is made adjustable about its lower end, the saidlower end being pivoted to the horizontal portion of the said frame 0.

If made so adjustable, it may be supported by a brace, M, and this bracemay have an index finger, m, which may indicate upon a scale, m, theexact adjustment that has been made. It is apparent that the adjustmentof this upright arm would determine the amount of taper or incline givento the bottom of the key-seat that is being cut, and it is also apparentthat if the upright arm is adjusted to the left the cutter will cutdeeper at the beginning of its stroke than at the end of its stroke,while if the arm is adjusted to the right it will cut a key-seat shallowat the beginning of its stroke and deeper at the upper end of itsstroke. \Vhen the machine is provided with this adjustable upright arm,theinclined face 1) (shown in Fig. 1) may be dispensed with, for theadjustable arm is designed to accomplish the samepurposeasthesaidinclined face.

There are many details of construction in this device which may beconsiderably varied without departing from my invention-"as, forinstance, instead of a feed-screw, F, the said feed may be accomplishedby a cam-lever or any other like device, and if accomplished by a leverthe lever may be so engaged with the head B and traveling frame 0 thatwhen forced in one direct-ion it will feed the said frame forward andwhen forced in the opposite direction will draw the said frame backward,in which event the spring K might be dispensed with. So, also, where therod J and hand-nut J are employed the scale I and index-finger I mightbe dispensed with, or both may be employed together, if desired. So,again, the wedge H might be displaced and the cam or eccentric beemployed for the same purpose, the purpose being simply to wedge theframe firmly against the face to be out; nor do I limit myself to theuse of the gear-wheels E, E and E, for it is manifest ICC that this partof the mechanism admits of many variations, the sole purpose being tocommunicate the motion of the drive-shaft either directly or indirectlyto the rack-bar D.

What I claim is 1. A portable key-seat cutter consisting of asupporting-frame for engaging the article to be cut, ahorizontally-sliding frame on said supporting-frame, a reciprocatingcutter-bar carried by the sliding frame and moving on the supportingframe, and a rotating feedscrew engaging the supporting-frame and thesliding frame to force the latter, with its outter-bar, forward to makethe desired cut, substantially as described.

2. A portable key-seat cutter consisting of a supportingframe having ahorizontal portion to rest on a wheel and a vertical portion to enterthe wheel-hub, a horizontally'sliding frame on the horizontal portion ofsaid supporting-frame, a vertically-reciprocating cutter-bar arranged tomove in the sliding frame and in the vertical portion of thesupportingframe, and a feedscrew engaging the outer end of thehorizontal portion of the support ing-frame and acting on the slidingcarriage to force the latter with the cutter-bar forward to make thedesired cut, substantially as described.

3. In a portable key-seat cutter, the frame B, provided with a verticalarm for entering a hub and a horizontal arm, and in connection therewitha rod, Gr, whereby the said frameis forced and held against the surfaceto be cut, substantially as and for the purpose described,

4. A portable keyseat cutter consisting of a frame, B, having ahorizontal arm and a vertical arm, the latter adapted to enter awheelhub, a sliding frame, 0, on the horizontal arm of thesupporting-frame, a reciprocating cutter-bar, D, 011 the sliding frame,a Wedge, H, beside the vertical arm of the supportingframe, and a screwand nut, H, engaging the lower end of the said vertical arm andc0nnected with the wedge for drawing the latter downward and forcing thevertical arm against the inside of the wheel-hub, substantially asdescribed; I

5. A portable key-seat cutter consisting of a supportingframe, B, havinga horizontal arm and a vertical arm, the latter adapted to enter awheel-hub, a horizontally-sliding frame, 0, on the horizontal arm, areciprocating cutter-bar, D, moving in the sliding frame and in thevertical arm of the supporting-frame, and a vertically-adjustable wedge,H, for forcing the vertical arm of the supporting frame against theinterior of the wheel-hub, substantially as described.

6. The combination, in a portable key-seat cutter, of thesupporting-frame B, the sliding frame 0 on the latter, the verticalrack-bar D, the drive-shaft E, geared with the rack-bar, thedrive-pulley e,lo0se on the drive-shaft, and a clutch, L, on thedrive-shaft for locking the drive-pulley to and releasing it from thedriveshaft, substantially as described.

7. The combination, in a portable keyseat cutter, of thesupporting-frame B and the slid ing frameG thereupon, having horizontaland vertical portions pivotally connected together for adjusting thevertical part out of perpendicular, substantially as described,

8. In a portable key-seat cutter, the combination, with the travelingframe 0 and its reciprocating tool -supporting bar, of the supporting-frame B, the vertical leg of which is provided with an inclinedface, b, substantially as and for the purpose described.

In testimony whereof I sign this specification in the presence of twowitnesses.

MATTHEW MORTON.

\Vitnesses:

M. B. ODOGHERTY, JOHN E. WILEs.

